diff options
Diffstat (limited to 'drivers/isdn/capi/capiutil.c')
| -rw-r--r-- | drivers/isdn/capi/capiutil.c | 41 |
1 files changed, 34 insertions, 7 deletions
diff --git a/drivers/isdn/capi/capiutil.c b/drivers/isdn/capi/capiutil.c index 4073d1684d07..36c1b37cea0a 100644 --- a/drivers/isdn/capi/capiutil.c +++ b/drivers/isdn/capi/capiutil.c @@ -207,9 +207,24 @@ static unsigned command_2_index(unsigned c, unsigned sc) c = 0x9 + (c & 0x0f); else if (c == 0x41) c = 0x9 + 0x1; + if (c > 0x18) + c = 0x00; return (sc & 3) * (0x9 + 0x9) + c; } +/** + * capi_cmd2par() - find parameter string for CAPI 2.0 command/subcommand + * @cmd: command number + * @subcmd: subcommand number + * + * Return value: static string, NULL if command/subcommand unknown + */ + +static unsigned char *capi_cmd2par(u8 cmd, u8 subcmd) +{ + return cpars[command_2_index(cmd, subcmd)]; +} + /*-------------------------------------------------------*/ #define TYP (cdef[cmsg->par[cmsg->p]].typ) #define OFF (((u8 *)cmsg) + cdef[cmsg->par[cmsg->p]].off) @@ -302,7 +317,9 @@ unsigned capi_cmsg2message(_cmsg *cmsg, u8 *msg) cmsg->m = msg; cmsg->l = 8; cmsg->p = 0; - cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)]; + cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand); + if (!cmsg->par) + return 1; /* invalid command/subcommand */ pars_2_message(cmsg); @@ -375,7 +392,9 @@ unsigned capi_message2cmsg(_cmsg *cmsg, u8 *msg) cmsg->p = 0; byteTRcpy(cmsg->m + 4, &cmsg->Command); byteTRcpy(cmsg->m + 5, &cmsg->Subcommand); - cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)]; + cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand); + if (!cmsg->par) + return 1; /* invalid command/subcommand */ message_2_pars(cmsg); @@ -470,12 +489,17 @@ static char *mnames[] = * @cmd: command number * @subcmd: subcommand number * - * Return value: static string, NULL if command/subcommand unknown + * Return value: static string */ char *capi_cmd2str(u8 cmd, u8 subcmd) { - return mnames[command_2_index(cmd, subcmd)]; + char *result; + + result = mnames[command_2_index(cmd, subcmd)]; + if (result == NULL) + result = "INVALID_COMMAND"; + return result; } @@ -625,6 +649,9 @@ static _cdebbuf *printstruct(_cdebbuf *cdb, u8 *m) static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level) { + if (!cmsg->par) + return NULL; /* invalid command/subcommand */ + for (; TYP != _CEND; cmsg->p++) { int slen = 29 + 3 - level; int i; @@ -759,10 +786,10 @@ _cdebbuf *capi_message2str(u8 *msg) cmsg->p = 0; byteTRcpy(cmsg->m + 4, &cmsg->Command); byteTRcpy(cmsg->m + 5, &cmsg->Subcommand); - cmsg->par = cpars[command_2_index(cmsg->Command, cmsg->Subcommand)]; + cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand); cdb = bufprint(cdb, "%-26s ID=%03d #0x%04x LEN=%04d\n", - mnames[command_2_index(cmsg->Command, cmsg->Subcommand)], + capi_cmd2str(cmsg->Command, cmsg->Subcommand), ((unsigned short *) msg)[1], ((unsigned short *) msg)[3], ((unsigned short *) msg)[0]); @@ -796,7 +823,7 @@ _cdebbuf *capi_cmsg2str(_cmsg *cmsg) cmsg->l = 8; cmsg->p = 0; cdb = bufprint(cdb, "%s ID=%03d #0x%04x LEN=%04d\n", - mnames[command_2_index(cmsg->Command, cmsg->Subcommand)], + capi_cmd2str(cmsg->Command, cmsg->Subcommand), ((u16 *) cmsg->m)[1], ((u16 *) cmsg->m)[3], ((u16 *) cmsg->m)[0]); |